Method and apparatus for cooling glassware and the like



Nov. 3,1925- METHOD AND AEPARATUS FOR COOLING GLASSWARE AND THE LIKEFiled March 12. 1920 2 Sheets-Sheet l Nov. 3I 1925. 1,560,062

P. KUCERA METHOD AND APPARATUS FOR COOLING GLASSWARE AND THE LIKE FiledMarch 12, 1920 2 Sheets-Sheet 2 wumtoz I @5% @www E Patented Nev.3.1925.

PETER`KUCEBA, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 CAPSTAN GLASSoolnaNY, or' sourrn coNNELLsvILLE,

WARE

PENNSYLVANIA, CORPORATION 0F DELA- MEIBD AND AIPA-IBAT'IJ'S FORCOOLTNGGLASSWABE AND THE LIKE.

Application led Iareh 12,' 1920. Serial No. 865,154.,

To all whom it may camera.'

Be itlmown that I, PETER KUGERA, a citizen of the United States,Iresiding at Pittsburgh, in the county of Allegheny, State ofPennsylvania, have invented certain new and useful ImprovementsA inMethods and Apparatus for Cooling Glassware andthe like, of which thefollowing is a specification.

This invention relates broadly to the cooling of articles, made fromplastic charges,

before the articles leave the molds; and more` particularly relates tothe manufacture of.

glassware.

The principal object lof the present 1nvention is to provide aconstruction for cooling presse'd glass articles before the articleleaves the mold.

Another object of the present invention is an improvement in presses forglass manufacture and wherein the ware is automatically cooledvas theforming members separate and before the sustaining members of the moldare removed.

A still further object of the presentl invention is an improvement inmachinery for manufacturing pressed glassware which comprises theprovision ofcoolin fluids controlled as to presssure and direction andwhich are adapted to surround one of the ware-forming elements as theelementis removed from the pressed article. j

A still further and more specific object of the present inventionis animprovement in glass machinery which relates. to cooling ware in blockmolds provided with rings, in

such manner that the ware is not distorted when the ring is removed.

A still further object of the present invention is an improvement inglass machin# ery wherein a current of air 1s directed' in such manneras to flow over and surround a pressing plunger as it leaves the mold,and to continue after the plunger has left the mold whereby the glass inthe mold is cooled to such a degree as'to not distort when the ring moldis removed.

j Still more specifically, the present invention contemplates animprovement in glass machinery in connection with automatically operatedpressing machines provided' wit block molds `and a single ring mold, and

wherein the `pressed glass within the rin -mold is sufficiently cooledby the controlle cooling medium before the ring is lifted and prior tothe movement of the mold from the pressing station.

From the following s ecifc description it will be apparent 'that t epresent invention may be embodied in constructions other than thosespecifically .outlined herein, so, therefore, I desire that theconstructions herein shown and described shall be considered asillustrative and not in a. limiting sense. i v

Figure 1 is a more or less diagrammatic view of portionsof a pressprovided with the present invention. p

Figure 2 is a view illustrating one form of cooling ring adjacent theplun er.

Figure 3 is a view illustrating t e cooling fluid being projectedbetween the plunger and the glass in the mold as the plunger is removed.

` Heretofore in the art in the manufacture of glassware in'block molds,particularly tumblers or packers ware, it has been customary to rovideremovable ring molds at the top o the block mold. These ring molds areusually adapted .to remain in positionk on the block mold during severalmovements of the mold table and are re-v moved just prior to the moldreachinv the discharging station, at which-.point the ware is usuallyautomatically lifted from the block mold. Ordinarily these ring moldsare removed manually just prior to the warecarrying mold reaching thedischarging station. Ring molds are usually relatively .light in'weightand consequently heat quicktherefore there is liability of the glasssticking tothe ring mold, and consequently.

the temperatures at which the glass must be worked on an automaticmachine cannot rise beyond a predetermined point. It is speciallydesirable in the making of certain'ware by automatic machinery that the'glass be particularly hot. Where ivery hot glass is worked it `has beenfound that there is atenden'cy ofthe ware to collapse asl the plunger iswithdrawn. Where lng made is ucts by automatically mechanically appliedthe ware be` for use in packing food prodclosures, it is necessary thatpredetermined dimensions-be closely adhered to. In view of, these facts,in ware madel by the old Ymethods of manufacture there vare largegcfluantities of glassware that cannot be used It has been found by thisconstruction that chilled sulliciently to permit withdrawal ofy a singlering mold having a deep mold sur- .face may be successfully used with aplural- 1ty of block molds, and the ware will be the ring within therequired period of time determined by the rate of production establishedby the movement of the press and the glass feeder. This obviates thenecessity of changing rings manually from one inold-to another, and atthe same time permits the manufacture of deep finished packers warewithout slowing up the rate of 'production and without the necessity ofshifting a plurality of ring molds.

Referring now to the drawings and ,more particularly to Figure 1thereof, which represents a fragmentary portion of a press,

the yoke 1 is mounted on a pedestal 2 and a supporting pillar 4. Thepedestal carries a rotating mold table 5 that is locked at each stationby a bolt 6 automatically operated with the movement of the mold table,all of which is common in the art. This yoke 1 carries a pressingplunger staff 7 on which is removably mounted a plunger head 8. Thestaff 7 is adjustably mounted in the yoke 1 by means of the adjustingnuts 9 and 10. The mold table carries a plurality of molds, one of whichis shown, and it comprises a block mold 11 secured to a base 12andfprovided with a ware lifter 14. The base 12 .is adapted to cooperatewith the pressing plunger 15y that is secured to a piston 16 mounted ina cylinder 17 which is adapted to'be su plied with compressed airthrough a suitab e pipe as at 18v when it is desired to ress ware in theblock mold 11 as will be ater described. A ring mold 19 is mounted on aring mold carrier 2Q which is supported by carrying rods 21 and 22.`These carry-I mgrods connect at their upper ends with a cross bar 24 towhich is connected the plston rod 25 of an air piston 26 that is mountedin a cylinder` 27. This cylinder is connected by means of pipes 28 and29 with a suitable source of compressed air. A pipe 30 leads f from thepipe 28 to a cylinderA 31 in which is mounted a piston 32. Thisl pistonis directly connected to a valve 34 mounted in ,the valve casing 35. Thevalve casing 35 controls a flow of compressed air through the pipe 36which leads to a cooling ring 37 surrounding the head of the plunger 8.

Assuming a suitable charge of glass to have entered the block mold 11and that the mold table has moved the mold to the pressing stationbeneathV the plunger 8, compressed air is then supplied through thepipe18, thereby'lifting the piston 16, and through the connected partsraising the block mold -11 against the plunger 8. As the block mold 11approaches the limit of its upward travel against the plunger 8,compressed air is automatically admitted through the pi e 28 to' thecylinder 27, thereby tightly hol ing the ring mold 19 against the blockmold 11 and the compressed air is continued on the pipe 28 aftercompression has been released from the cylinder 17 beneath the piston 16so that the ring mold 19 continues to follow the block mold in itsreturn movement and rests against the upper end of the bl/ock mold afterreturn movement is completed. It is to be noted that as soon as pressureis admitted to the pipe 28 and to the cylinder 27 itis likewise admittedto the branch pipe 30 and to the cylinder 31, thus -opening the line 36just prior to the completion of the pressing operation so that as thepressing operation is completed blasts of cold air are directed throughthe openings in the ring 37,

and downwardly along the side walls of thel piston 8. This blast of airat its beginning spreads out over the top of the ring mold and tends tokeep this mold cool. Immediately as the block moldll starts to descendthe blast of air following the plunger 8 blows downwardly around theplunger as indicated by the arrows A in Figure 3 and forms a cushion offluid pressure between the side walls of the glassware B andthe plunger8'.v This pressure maintains the glass against the side walls of theblock mold 11 and the ring mold 19 and prevents collapse of the ware andat the same time cools the article being made. This air blast actioncontinues as the plunger and the mold separate and is maintained untilthe pressure is lOl relieved on ,the line 28 and air is admitted throughthepipe 29 to raisethe ring mold. This movement is just prior to themovement of the mold .table which carries the pressed glassware to thenext mold station and brings a mold carrying a new charge beneath thepressing station, when the oper- -ations are re cated.

ing blast being directed downwardly into the warewhich has just beenpressed. This acplunger and that this cushion tion facilitates rapidityof operation, simplifies the constructions for handling ring molds, andpermits deep finished ware to be madewith a single ring mold withoutdistortion of the ware after the pressing operation.

From the foregoing it will be evident that the present invention alsocomprises the method of cooling glassware articles and the like bysubjecting the pressed article to a cool air fluid during the removal ofone of the mold members. Itjwill also be apparent that the inventioncomprises the method of supporting the hot pressed article by means of agaspressure'which is established between one of the `mold-formingmembers and the larticle whereby the said walls of the article aresustained when Ithe mold-forming member is being removed.

Having described my invention, what I claim is:

1. The method of cooling pressed glassware and the like which `comprisesforming an article by ressing a suitable charge between movablia drawingcertain of the shaping members from the finished article and maintaininga cooling mediuml under pressure between the article and the withdrawnmember during the entire time the member is leaving the article and withthe space between the article and the Iwithdrawn member open toatmosphere.

2. The method of cooling pressed Iglassware and the like which comprisesforming an article by pressing a suitable charge between movable shapingmembers, withdrawing certain of the shaping members from the finlshedarticle and maintaining a blast cooling medium directed between thearticle and the withdrawn member during the time the member is leavingthe article and with the space between the article and the withdrawnmember open to atmosphere.

3. The method of cooling'ppressed glassware and the like which com risesforming an article by pressing a suitaile charge be tween movableshaping members, withdrawing certain of the shaping members from thefinished article and maintaining a blast cooling medium directeddownwardly between the article and the withdrawn member during the timethe member is leaving the ar ticle; permitting the cooling medium to esafluid under pressure between the formin member` and the hot pressed`article, an

shaping members, withgradually reducing the effective pressure as theforming member is withdrawn.

l5. The method of-cooling glass pressed articles and the like whichmethod comprises pressing a charge of plastic glass between suitableforming members, withdrawing one of said members from the pressedarticle before the article is cooled, then providing a fluid underpressure between the forming member and the hot pressed article, andgradually reducinfr the effective pressure as the forming member iswithdrawn by separating the orifice through which the fluid issues fromthe article as the forming member recedes.

. 6. The method of cooling glass pressed articles and the like whichmethod comprises pressing a charge of plastic glass between suitable4forming members, withdrawing one of said members from the pressedarticle b e fore the article is cooled, thenproviding a directed airblast to form a pressure between the forming member' and the hot pressedarticle, and gradually reducing the effective pressure as the formingmember is withdrawn by separating the orifice through molds, applying ablast of free unconinedl jets of cooling air adjacent the mouth of themold, said jets being uniformly spaced around the circumference of themouth of said mold, then gradually withdrawing one of the mold membersfrom the pressed article and directing the blast of air downwardlybetween the molded article and the member being withdrawn to cool themolded article as the mold member is .withdrawn 8.The method ofmanufacturing packers glassware which comprises pressing a suitableVcharge of plastic glass in suitable molds, applying a blast of coolingair adjacent the mouth of the mold at the completion of the. pressingoperation, permitting the cooling air to .escape during the blast, thengradually withdrawing one of the mold members from the pressed articleand continuing the blast of air downwardly to provide a layer ofcompressed air between the molded article and the member being withdrawnto cool the molded article as the mold member is withdrawn. l

9. The method of manufacturing packer-s glassware which comprisespressing a suitable charge of plastic glass in suitable molds, applyinga blast of cooling air adjacent the mouth of the mold at the completion-of the pressing operation, vthen gradually vwithdrawing one of the moldmembers from the pressed'article and continuing a plurality of spacedapart jets of air'downwardly to prov1de a. layer ofv compressed airbetween the lapse of hollow molded glassware when certain of the moldmembers are removed from' the shaped article, which method comprisespressing the ware in suitable molds, withdrawing one of the pressingmembers and supplying air under pressure between the plunger and theinterior walls of the pressed article to sustain and simultaneously coolthe said walls, and permitting the air to eslcape during the time whenit is being supied. P 11. The method of preventing the collapse ofhollow molded glassware when ce-rtain of the mold members are removedfrom the shaped article, which method comprises pressing the ware insuitable molds, wit-hdrawing one of the pressing members and supplyingair in the form of a plurality of downwardl directed jets under pressurebetweei the p unger and the interior walls of the pressed article tosustain and ytaneously cool the said walls.

12. The method of preventing -the collapse of hollow molded glasswarewhen certain of the mold members are removed fromk the shaped article,which method comprises pressing vthe ware in suitable molds, withdrawingone of the pressing members and supplying air in the formpf a(plural1tyof open-jets under pressure directe downward between the plunger and theinterior walls of the `pressed article to establish pressure to sustalnand simultaneously cool the said walls.

13. The method of manufacturing packers ware and the like, whichcomprises` pressing the ware in suitable molds, subjecting the upperportion of the mold to a blast of cooling air which is directeddownwardly along the side walls of the pressing plunger, graduallyremoving the. pressing plunger, and continuing the'blast of cooling airas the pressing plunger is removed and until the rmg mold is lifted fromthe body mold, and permitting ythe cooling air to escape before the ringmold is lifted.

14. A device for pressing glassware and the like comprising in'combination -a matrix mold adapted to receive a charge of` glass,

a pressing plunger, devices to cause a rela--l 'tive movement betweenthe matrix mold and Y plunger to form a glass article from the char e inthe mold, and means stationary relatlvely to the plunger to subject alpor: tion of the mold to a cooling blast of air during the completion ofthe pressing movement and during the separation of the mold partswhereby the eii'ective intensity of the blast decreases as the articlein thelmold reoedes from the plunger.

15. A device for pressing glassware and simulthe like comprising incombination a matrix mold adapted to receive a `charge of glass, apressing plunger, devices to Cause a relative movement between thematrix mold and plunger to form a glass article from the charge in themold, and means to subject a portion of the mold to a cooling blast ofair during the completion of the pressing movement and during theseparation of the mold parts, said means being constructed to provide auniformly distributed flow of cooling air into Vand out of said article.

16. A device for pressing glassware and the-like comprising incombination a matrix mold adapte-d to receive a charge of glass, apressing plunger, devices tocause a relative movement betweenl thematrix mold and `plunger to form a glass article from the ,said meansbeing constructed to provi e a uniformly distributed flow of cooling airin to said article.

17. In a machine for the manufacture of pressed glassware, thecombination of ablock mold, a ring mold adapted to be seated on saidblock mold, a plunger, means for moving said block mold and ring moldinto engagement with said plunger to shape a glass charge within theblock mold, a cylinder, a piston within' said cylinder, meansoperatively connecting said piston with said ring mold whereby whenfluid under pressure is admitted to one si-de of said piston the ringmold is pressed against the block mold, a valve controlled by the saidfluid pressure toopen a passageway for transmission of cooling air, andmeans' connected with said passageway to direct a blast of cooling airlaround said ring mold and between the ring mold and the plunger.

18. In -a machine for the manufacture of pressed glassware, thecombina-tion of a block mold, a ring mold adapted to be seated on saidblock. mold,.a plunger, means for moving said block mold and ring moldinto 4 der, a piston within said cylinder, downwardly depending rodsoperatively connecting said piston with saidring mold whereby when Huidunder pressure is admitted to one side of saidk piston the ring mold ispressed against the block mold, a valve controlled by the said iiuidpressure to open aI passageway for transmission of cooling air, andmeans comprising a perforated ring connected with said passageway todirect a blast of cooling air downwardly around saidl ring mold andbetween the ring mold and the plunger when the ringmold and plunger areseparated. y 19. In a machine for pressing glassware and the like, thecombination of a carrier for a block mold, a block mold mounted on saidcarrier, a plunger, a ring mold mounted for movement relatively to saidAplunger, pneumatically operated means for raising and lowering saidringmold into and out of operative engagement with said block mold, and acooling device operative in timed relationwith said pneumatic means andadaptedto supply airv under pressure around said plunger when said ringmold is pressed intol engagement withtsaid block mold. y

20. In a machine for pressing glassware and the like, the combination ofa carrier for a block mold, a block mold mounted on said carrier, aplunger, a ring mold mounted for movement relatively to said plunger,pneumatically o erated means for raising and lowering sald ring moldinto and out ofl operative engagement with said block mold, and a coolin`device operative in timed relation with sai pneumatic meansv andadapted to supply air under pressure around said plunger when said ringmold is pressed into engagement with said block mol and to stop said airwhen the ring mold is lifted from the block mold.

21. In a glassressing machine, the combination of a mo d, a ring moldcooperative with the mold, a plunger -adaptedrto shape glass charges inthe said mold, means for rendering the plunger effective, a perforatedring surrounding the upper end of the said plunger, a' pipe adapted toconvey compressed air to said perforated ring, anda vring Y moldoperatin valve operative in timed relation with the mechanism to admitair to the perforate ring when the plunger is .being withdrawn from thering mold.

22.` In a glass-pressing machine, the combination ofa mold, a ring moldcooperative with the mold, a plunger adapted to shape glass charges inthe sa1d mold, means for rendering the plunger effective, a perforatedring surrounding the upper end of the said plunger, and stationaryrelatively thereto a pipe adapted to convey compressed air to saiderforated ring, and a valve operative in tlmed relation withvthe ringmold operating mechanism to admit air to the perforated ring when theplunger is being withdrawn from the ring'mold.

23. In a glass-pressing machine, the combination of a mold, a ring-moldcooperative with the mold, a `plunger adapted to shape glass chargesinthe said mold, Vmeans vfor rendering the plunger effective, aperforated ring surrounding the upper end of the said plunger, a pipeadapted to convey compressed air to said perforated ring, and aplstonoperative inV timed `relation with the lring mold operating mechanism tocontrol a valve to admit air to the perforated ring when the plunger isbeing withdrawn from

